1 /* 2 * Copyright (C) 2014 The Android Open Source Project 3 * 4 * Licensed under the Apache License, Version 2.0 (the "License"); 5 * you may not use this file except in compliance with the License. 6 * You may obtain a copy of the License at 7 * 8 * http://www.apache.org/licenses/LICENSE-2.0 9 * 10 * Unless required by applicable law or agreed to in writing, software 11 * distributed under the License is distributed on an "AS IS" BASIS, 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13 * See the License for the specific language governing permissions and 14 * limitations under the License. 15 */ 16 17 package com.android.internal.widget; 18 19 import android.compat.annotation.UnsupportedAppUsage; 20 import android.content.Context; 21 import android.os.Build; 22 import android.util.AttributeSet; 23 import android.widget.ImageView; 24 25 /** 26 * Extension of ImageView that correctly applies maxWidth and maxHeight. 27 */ 28 public class PreferenceImageView extends ImageView { 29 PreferenceImageView(Context context)30 public PreferenceImageView(Context context) { 31 this(context, null); 32 } 33 34 @UnsupportedAppUsage(maxTargetSdk = Build.VERSION_CODES.R, trackingBug = 170729553) PreferenceImageView(Context context, AttributeSet attrs)35 public PreferenceImageView(Context context, AttributeSet attrs) { 36 this(context, attrs, 0); 37 } 38 PreferenceImageView(Context context, AttributeSet attrs, int defStyleAttr)39 public PreferenceImageView(Context context, AttributeSet attrs, int defStyleAttr) { 40 this(context, attrs, defStyleAttr, 0); 41 } 42 PreferenceImageView(Context context, AttributeSet attrs, int defStyleAttr, int defStyleRes)43 public PreferenceImageView(Context context, AttributeSet attrs, int defStyleAttr, 44 int defStyleRes) { 45 super(context, attrs, defStyleAttr, defStyleRes); 46 } 47 48 @Override onMeasure(int widthMeasureSpec, int heightMeasureSpec)49 protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) { 50 final int widthMode = MeasureSpec.getMode(widthMeasureSpec); 51 if (widthMode == MeasureSpec.AT_MOST || widthMode == MeasureSpec.UNSPECIFIED) { 52 final int widthSize = MeasureSpec.getSize(widthMeasureSpec); 53 final int maxWidth = getMaxWidth(); 54 if (maxWidth != Integer.MAX_VALUE 55 && (maxWidth < widthSize || widthMode == MeasureSpec.UNSPECIFIED)) { 56 widthMeasureSpec = MeasureSpec.makeMeasureSpec(maxWidth, MeasureSpec.AT_MOST); 57 } 58 } 59 60 final int heightMode = MeasureSpec.getMode(heightMeasureSpec); 61 if (heightMode == MeasureSpec.AT_MOST || heightMode == MeasureSpec.UNSPECIFIED) { 62 final int heightSize = MeasureSpec.getSize(heightMeasureSpec); 63 final int maxHeight = getMaxHeight(); 64 if (maxHeight != Integer.MAX_VALUE 65 && (maxHeight < heightSize || heightMode == MeasureSpec.UNSPECIFIED)) { 66 heightMeasureSpec = MeasureSpec.makeMeasureSpec(maxHeight, MeasureSpec.AT_MOST); 67 } 68 } 69 70 super.onMeasure(widthMeasureSpec, heightMeasureSpec); 71 } 72 } 73